#10/16 x 1-1/2" screws used to fasten 6-10mm multi-wall polycarbonate sheets to metal base. 100 screws with EPDM sealing washers per bag.
Worked perfectly for 8mm twin wall polycarbonate sheets and steel framed greenhouse. We predrilled holes. Since have had severe storms and not a leak and sheets are secure
some how your drive changed when i bought them two years ago. they were 1/4 drive now they are 3/8 there not the same
I am installing the thin wall poly-carbonate on a wood framed carriage house as ambient lighting above the plywood siding. It was tedious to get some of them started on the Doug fir framing. I could not get a couple to get through where there was a knot.
These screws worked really well for attaching my polycarbonate sheets. I like the nice big washers
